Allens Over Shooting & Safety Glasses are for use over most prescription glasses, and theyre also great for people who are looking for a little more coverage without interfering with many styles of shooting muffs.The oversized temples are shaped to avoid adding extra pressure on the side of your head when wearing two pairs of glasses, and the rubber guard on the top helps ensure they rest comfortably on your face.With a metallic coating on the lenses, these glasses have 100% UV protection and are ANSI Z87 impact resistance rated.